This book describes the workings of hydronic heating systems. The drawings are simple; even if you've never worked with hydronics before, you'll be able to follow them. The first part of the book deals with boiler room piping and explains how to put the discoveries of the late, great Gil Carlson to work for you. If you pipe a boiler Gil's way, you'll save time, money and eliminate the need to bleed individual radiators. The second half of the book takes the "Pumping Away" boiler-room piping design and applies it to an entire menu of piping options. Pumping Away contains 122 pages and is a great reference tool. It will save you time and money.